16-GI-001

GROUP
GENERAL
DATE
Technical Service Bulletin
SUBJECT:
SEPTEMBER
2016
NUMBER
16-GI-001
MODEL(S)
Elantra Eco (AD), Sonata
Eco (LF), Tucson (TL),
Veloster Turbo (FS)
INTRODUCTION TO DRY-TYPE DUAL CLUTCH TRANSMISSION
Description: This bulletin provides information on components, attributes, and precautions of the 7speed dry-type dual clutch transmission (DCT).
Applicable Vehicles: All vehicles equipped with 7-speed Dual Clutch Transmission (DCT)
Characteristics of dual clutch transmission system:
The dual clutch transmission has the
driving feel of a manual transmission. It has
one clutch for the odd gears, and one
clutch for the even gears including reverse.
During shifting, the clutches are engaged
and disengaged automatically. Unlike a
traditional automatic transmission, the gear
shifting can be felt and heard.
- Think of it as an automatically
shifting manual transmission
Double Clutch Assembly
NOTICE
When turning the engine on and off, you may hear clicking or humming sounds from the
shift and clutch actuators as the system goes through a self-test. This is a normal
characteristic of the dual clutch transmission.
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
SUBJECT:
INTRODUCTION TO DRY-TYPE DUAL CLUTCH TRANSMISSION
Differences between dual clutch transmission and automatic transmission
Item
Dual Clutch Transmission
(Dry-type)
Automatic
Transmission
Method of power
transfer
Direct friction between
clutch cover and disc
Fluid Coupling
Transmission Efficiency
High
Low
Acceleration
performance
Excellent
Good
Gear Shift
Dynamic
Smooth
Picture
NOTICE
The dry-type clutch provides a direct driving feeling which may feel different than automatic
transmission. This may be more noticeable when starting from a stop or at low vehicle
speed.
1.
2.
3.
■
Common Conditions That May Cause Clutch Overheating and Warning Message
Holding the vehicle at a stop on a steep hill by applying the accelerator pedal instead of using
the foot brake or the parking brake (Throttle Hill Hold).
Repeated stop and go driving up hills and slow speeds (under 6 MPH).
Repeated up and down shifting for a prolonged period of time under heavy loads (heavy stopand-go traffic).
Throttle Hill Hold:
When a vehicle is held by applying the accelerator pedal instead of the brake on a hill.
TSB #: 16-GI-001
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SUBJECT:
INTRODUCTION TO DRY-TYPE DUAL CLUTCH TRANSMISSION
Clutch Overheating Warning Messaging
Since the dry-type DCT transfers power using friction between the clutch cover and disc, it
has the potential to overheat. Therefore the transmission system has both visual and
audible warning message (LCD cluster & chime) when the clutches are above normal
operating temperatures.
Warning
Functional
Restriction
Stage
Condition
Hill Hold
Slope greater
than 5%,
brake off,
accelerator
applied, and
speed under
3MPH
3 times
-
Vehicle
shuddering
after 1~2 sec
1st
stage
High temperature
detected
3 times
3 times
-
2nd
stage
Temperature
increased after
1st stage
Repeat
of 1st
stage
Repeat of 1st
stage
-
3rd
stage
Temperature
increased after
2nd stage
Repeat
of 1st
stage
Repeat of 1
stage
Single clutch
control
4th
stage
When both
clutches get to the
3rd stage
Repeat
st
of 1
stage
Repeat of 1st
stage
Clutch open
(No driving
available)
SelfProtection
Mode
LCD
Sound
Blinking LCD
st
If the clutch becomes overheated, stop the vehicle as soon as safely possible and allow the
transmission to cool with the engine running. When the warning message is no longer
present in the LCD cluster, it is safe to resume normal driving.
TSB #: 16-GI-001
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SUBJECT:
INTRODUCTION TO DRY-TYPE DUAL CLUTCH TRANSMISSION
Recommended driving tips to prevent clutch overheating
Hill Condition
Traffic Condition
Rapid Acceleration
Condition
Use the foot brake or the
parking brake to hold the
vehicle on a hill.
When the vehicle is
continuously driven under 6
MPH because of traffic,
occasionally leave a larger
distance to the vehicle in
front and drive over 6 MPH.
Stop the vehicle using the
brake pedal when it is
necessary.
Depress the accelerator
pedal smoothly and avoid
rapid acceleration.
1) Depress the brake pedal and
leave a larger distance to the
vehicle in front.
2) When the distance is large
enough drive faster than 6 MPH.
6
MPH↑.
3) Stop and repeat steps 1 and 2.
TSB #: 16-GI-001
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SUBJECT:
INTRODUCTION TO DRY-TYPE DUAL CLUTCH TRANSMISSION
Reference material
Reference Material
Description
When the vehicle is purchased, there’s a
hang-tag with information regarding Dual
Clutch Transmission (DCT).
The owner’s manual can be referred to
for additional information on the
overheating warning messages.
https://www.youtube.com/watch?v=W42z
sFYjZvM&index=2&list=PLHmJCvAgQYlr
IzUmdb88Ncc6WaUXdSFZr
Links to Hyundai videos referencing Dual
Clutch Transmission (DCT) operation and
good practices.
https://www.youtube.com/watch?v=C1B_
lb6vOgQ
TSB #: 16-GI-001
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